CERN Accelerating science

The ATLAS and CMS Experiments at CERN have just released a new measurement of the mass of the top quark. The new result combines 15 previous measurements to give the most precise determination of the top-quark mass to date.

Yesterday at 7:46 pm the first stable beams of the LHC 2023 heavy-ion run have been recorded. The heavy-ion run allows CMS scientists to study states of matter similar to those of the early universe.

Every year,

New release of simulations, proton-lead collision data, and proton reference data

A new search conducted by the CM

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Most searches for new physics b

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